Telephone off-hook indicator



FIG. 1 is a perspective view of the ornamental design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right end elevational view thereof;

FIG. 5 is a left end elevational view thereof;

FIG. 6 is a front side elevational view thereof; and,

FIG. 7 is a rear side elevational view thereof. 

The ornamental design for a telephone off-hook indicator, as shown. 